![]() I’ve also done a couple of other experiments in which fine output time intervals are desired. LAB Number 8 LAB Title Timer Mode Periodic Event (in microseconds) Here is the generated initialization code in the main.c file So we can start writing the application code and have a look at the initialization code generated by the STM32 CubeMX tool. Then, open the project in the IDE you’re using. Step9: Name & Generate The Project Initialization Code For CubeIDE or The IDE You’re Using Step8: Set The System Clock To Be 72MHz Or Whatever You Want Step5: Enable The Timer Interrupt Signal In NVIC Tab And the timer module will be clocked at the internal clock frequency. Let it be B13 pin for example! ( The LED Pin)Īs we’ve calculated earlier, the Prescaler will be 1000, and the Preload value will be 7200. Step3: Click On The Pin You Want To Configure As An Output & Select Output Option Step2: Choose The Target MCU & Double-Click Its Name Measure and verify the output signal’s timing.Toggle an output pin (LED) each 100mSec in the timer overflow ISR.Set The Prescaler, and the Preload value so that the output Time interval is 100mSec.Configure the general-purpose timer (TIM2) to operate in timer mode.LAB Number 7 LAB Title Timer Mode Periodic Event Now, the only unknown is the Preload value. So, from the above equation, we can assume the F CLK to be 72MHz. We’ll toggle the LED once each 100mSec and we’d like to set up the timer interrupt to give us this time interval. In LAB7, we’ll set our desired output time interval to be 100mSec. Now, we can choose a value for the Prescaler then put in the desired T OUT and solve for the Preload register value. Given that the blue pill board can run up to 72MHz, and let’s set the frequency to 72Mz. And toggle an LED in the interrupt service routine (ISR) for the timer overflow event.Īs you can see, the output time interval is determined by the Prescaler value, the clock frequency, and the timer preload register’s value. We’ll set the overflow time interval to the desired value using the equation down below. In this LAB, we’ll set up a general-purpose timer module to operate in timer mode. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network (EPN) and. Logic Analyzer (on ) ( on eBay)Īffiliate Disclosure: When you click on links in this section and make a purchase, this can result in this site earning a commission.FeelTech DDS Function Generator: KKMoon FY6900 (on ) ( on eBay).My Digital Storage Oscilloscope (DSO): Siglent SDS1104 (on ) ( on eBay).Some Extremely Useful Test Equipment For Troubleshooting: ★ Check The Full Course Complete Kit List ![]() ST-Link v2 Debugger or ( eBay) QTY Component Name □ □ 2 BreadBoard Amazon eBay 1 LEDs Kit Amazon Amazon eBay 1 Resistors Kit Amazon Amazon eBay 1 Capacitors Kit Amazon Amazon eBay & eBay 2 Jumper Wires Pack Amazon Amazon eBay & eBay 1 9v Battery or DC Power Supply Amazon Amazon Amazon eBay 1 Micro USB Cable Amazon eBay 1 Push Buttons Amazon Amazon eBay.Blue Pill STM32-F103 (ARM Cortex-M3 72MHz) or ( eBay).Nucleo32-L432KC (ARM Cortex-M4 80MHz) or ( eBay).without further ado, let’s get started!Īll the example code/LABs/projects in the course are going to be done using those boards below. And also we’ll see how to calculate the timer preload value to get the desired output time interval exactly. Then, we’ll write simple application code to test the hardware functionalities. You’ll go through step-by-step HAL example configurations to initialize all the required hardware peripherals. And use it to generate a periodic interrupt signal to toggle an LED. In this LAB, we’ll discuss how to configure the STM32 timer module to operate in the timer mode. Previous Tutorial Tutorial 13 Next Tutorial STM32 Timers – Timer Mode LAB STM32 Course Home Page □
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